<!DOCTYPE html>
<html lang="zh-CN">
<head>
    <meta charset="UTF-8">
    <meta name="viewport" content="width=device-width, initial-scale=1.0">
    <title>404 - 页面未找到</title>
    <style type="text/css">
        body {
            width: 90%;
            max-width: 900px;
            margin: 0 auto;
            padding: 60px 20px;
            font-family: "Microsoft YaHei", Arial, Helvetica, sans-serif;
            line-height: 1.8;
            color: #333;
        }
        .header {
            text-align: center;
            margin-bottom: 40px;
        }
        h1 {
            color: #e74c3c; /* 错误提示红色 */
            font-weight: bold;
            margin-bottom: 15px;
            font-size: 2.2em;
        }
        .error-code {
            color: #c0392b;
            font-weight: bold;
            font-size: 1.2em;
        }
        .main-content {
            background-color: #fef9f9;
            padding: 30px;
            border: 1px solid #f5d6d6;
        }
        .highlight {
            color: #2980b9;
            font-weight: bold;
        }
        .suggestion {
            margin-top: 25px;
            padding: 15px;
            background-color: #f8f9fa;
            border-left: 4px solid #3498db;
        }
        .action-btn {
            display: inline-block;
            margin-top: 15px;
            padding: 8px 16px;
            background-color: #3498db;
            color: white;
            text-decoration: none;
            font-weight: bold;
            border: none;
            cursor: pointer;
        }
        .action-btn:hover {
            background-color: #2980b9;
        }
        /* IE 老版本兼容修复 */
        <!--[if lte IE 8]>
        .main-content {
            background-color: #fdf2f2;
            border: 1px solid #ecc8c8;
        }
        .suggestion {
            border: 1px solid #3498db;
            border-left-width: 4px;
        }
        .action-btn {
            /* IE8 不支持:hover，使用基本样式 */
            background-color: #3498db;
        }
        <![endif]-->
    </style>
</head>
<body>
    <div class="header">
        <h1>页面未找到</h1>
        <p class="error-code">Error 404 - Not Found</p>
    </div>

    <div class="main-content">
        <p>抱歉，您请求的页面不存在或已被移除。</p>
        <p>可能的原因：</p>
        <ul>
            <li>网址输入错误（请检查拼写）</li>
            <li>页面已被删除或移动位置</li>
            <li>链接已过期</li>
        </ul>

        <div class="suggestion">
            <p><strong>建议操作：</strong></p>
            <p>1. 返回 <a href="/" class="highlight">网站首页</a></p>
            <p>2. 检查网址是否正确后重新尝试</p>
            <p>3. 联系网站管理员获取帮助</p>
            <a href="/" class="action-btn">返回首页</a>
        </div>
    </div>
</body>
</html>
